import collections
class Solution(object):
    def checkIfExist(self, arr):
        d = collections.Counter(arr)
        if 0 in d and d[0] >= 2:
            return True
        for key in d:
            if key != 0 and 2 * key in d:
                return True
        return False


data = Solution()
arr = [10, 2, 5, 3]
print(data.checkIfExist(arr))
